In Borges's story, the Aleph is a point in space that contains all other points. Anyone who gazes into it can see everything in the universe from every angle simultaneously, without distortion, overlapping or confusion. The story continues the theme of infiniti found in several of Borges's other works, such as The Book of Sand.

As in many of Borges's short stories, the protagonist is a fictionalized version of the author. At the beginning of the story, he is mourning the recent death of a woman whom he loved, named Beatriz Viterbo, and resolves to stop by the house of her family to pay his respects. Over time, he comes to know her first cousin, Carlos Argentino Daneri, a mediocre poet with a vastly exaggerated view of his own talent who has made it his lifelong quest to write an epic poem that describes every single location on the planet in excruciatingly fine detail.

Later in the story, a business on the same street attempts to tear down Daneri's house in the course of its expansion. Daneri becomes enraged, explaining to Borges that he must keep the house in order to finish his poem, because the cellar contains an Aleph which he is using to write it. Though by now he believes Daneri to be quite insane, Borges proposes without waiting for an answer to come to the house and see the Aleph for himself.

Left alone in the darkness of the cellar, Borges begins to fear that Daneri is conspiring to kill him, and then he sees the Aleph for himself.

Though staggered by the experience of seeing the Aleph, Borges pretends to have seen nothing in order to get revenge on Daneri, whom he hates, by giving him reason to doubt his own sanity.

In a postscript to the story, Borges explains that Daneri's house was ultimately demolished, but that Daneri himself won second place in the ArgentineNational Prize for Literature. He also states his belief that the Aleph in Daneri's house was not the only one that exists, based on a report he has discovered by a British consul describing the Amr Mosque in Cairo, within which there is said to be a stone pillar that contains the entire universe; although this Aleph cannot be seen, it is said that those who put their ear to the pillar can hear it.

Notes

Aleph or Alef, א, is the first letter of the Hebrew alphabet and the number 1 in Hebrew. Its esoteric meaning in Judaic Kabbalah , as denoted in the theological treaty Sefer-ha-Bahir, relates to the origin of the universe, the "primordial one that contains all numbers".